package/mpd: depends on gcc and host gcc >= 7

mpd uses string_view since version 0.22 and
https://github.com/MusicPlayerDaemon/MPD/commit/fa45a8adfa44f6bc815ae7428770112c15c76d73

string_view is a C++17 feature:
https://github.com/MusicPlayerDaemon/MPD/commit/e0e5ed62ee98a0e21bc928f432a0051854193cd2

So add a dependency on host gcc >= 7

Moreover, C++17 is also mandatory on the target side since
https://github.com/MusicPlayerDaemon/MPD/commit/8f981845dc7376824d94fd24924788c582942929
so also bump the gcc dependency

Finally, drop BR2_TOOLCHAIN_HAS_GCC_BUG_64735 which is not needed as it
will always be true with gcc >= 7

Fixes:
 - http://autobuild.buildroot.org/results/e42a1d0cd808585a755754f839fe7d2080547191

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
1 file changed